NCHRP-350 compliant with 48" × 48" or smaller; plywood, aluminum, aluminum polylaminate, plastic, and roll-up sign materials. The Tri-Buster Tripod Sign Stand is the ideal combination of durability, economy, safety, and versatility. Perfect for the needs of many contractors, municipalities and utility companies. It is constructed of corrosion resistant heavy duty galvanized steel tubing for a long life at an economical cost. The three leg design of the Tri-Buster is very stable, in even the windiest of conditions. The ballasting hook allows sand bags or weights to be hung from sign stand for added stability. With safety in mind, the Tri-Buster has been engineered with guards to eliminate dangerous "pinch points" and protect fingers. A built-in 3-flag holder secures 2 or 3 standard ¾" wood dowel flags above the sign.